STM-2 USB Thin Film Rate/ Thickness Monitor

Small in Size and Price, Big in Performance


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Gemini™ MxG5xx

Sensor version
Ionization chamber
Emmision current
Flange connection to vacuum chamber
Switching function
Electrical connection
Digital interface
Analog output signal
Your configuration
Gemini™ MxG5xx
Switching functions
Electrical Connection
FCC, 8-pin
Digital Interface
Measurement range
1.2 - 8.68 V
Personal information
Gemini™ MxG5xx
Gemini™ MAG500
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STM-2 combines the simplicity of USB connectivity with the accuracy of a precision measurement engine, all in a compact, inexpensive package. The size and simplicity of STM-2 help make setup and operation easy and efficient.

Superior Performance

STM-2 is the most accurate USB powered thin film monitor in the industry. Ten measurements are taken per second while achieving a resolution of 0.037 Å per measurement (density of 1).

Easy and Flexible Installation

STM-2 comes with everything you need to connect your QCM sensor/feedthrough to a Windows® PC. Simply connect the included BNC cable from the feedthrough to STM-2, then connect the STM-2 to your PC using a standard mini USB cable (included). No external oscillator or power supply is required.

STM-2 features an internal oscillator that allows for simple and cost effective installation when STM-2 is located within 1 m (40 in.) of the quartz crystal. A standard INFICON® oscillator kit can be used for applications where STM-2 must be located farther away from the feedthrough.

STM-2 Software

STM-2 includes LabVIEW® software, capable of simple operation and data logging. Windows software is also included for operation and data logging of up to eight STM-2s simultaneously (each STM-2 requires a powered USB port).

Please Note: 
The SMDP Server must be installed first for the STM-2 Windows Application Software or the STM-2 LabVIEW Application Software to function properly.


  • Low cost instrument
  • USB connection
  • Internal oscillator
  • High accuracy at 10 measurements per second
  • Compatible with an external oscillator
  • Includes software


Sensor inputFemale BNC
Measurement frequency range6.0 to 5.0 MHz (fixed)
Thickness and rate resolution/measurement±0.037 Å @ tooling/density = 100/1, fundamental frequency = 6 MHz
InterfaceUSB v1.1 or later capable of providing 400 mA, 5 V (dc)
Computer requirementsAny PC running Windows 2000, XP, Vista, 7, or 8 with one available USB 1.1 (or later) port for each STM-2
Part Number
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STM-2STM-2 USB Thin Film Rate/Thickness Monitor
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